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obtained, this measure being applied in various comparisons. 

 The higher values of pattern intensity indicate greater fre- 

 quency and greater complexity of patterns. 



Summations of the values of the several fields in palm or 

 in sole yield a measure termed "total intensity". The total 

 intensities of both palm and sole in prosimian genera are 

 widely variable. Of the other groups, the Old World monkeys 

 present the highest values. New World monkeys are next in 

 the order of decreasing values; the higher primates, with 

 gibbon having the minimum, present still lower values. 



In non-human primates total pattern intensity is higher in 

 palm than in sole, probably indicating greater advance in 

 specialization of the foot. (There are other dermatoglyphic 

 expressions marking greater advance in the foot of non- 

 human primates : more extensive area of formed ridges in 

 genera having incompletely ridged volar surfaces; more ac- 

 celerated suppression of central pads; the generally greater 

 degree of departure from the basic plan ; and, except in chim- 

 panzee, a larger magnitude of asymmetry. Man represents 

 an exception to conditions typical of primates, in presenting 

 a higher total intensity in the sole and in having a plantar 

 asymmetry which is much reduced in comparison with that of 

 the palm ; in man, therefore, the sole is in these respects less 

 advanced than the palm.) 



The intensities of individual configurational fields are 

 analyzed in detail. Among other findings, it is shown that 

 the elevation of plantar intensity in man is localized in the 

 distal hypothenar field and in interdigitals I, II and III, the 

 interdigital areas alone being exceptional to the trend in 

 non-human forms. The third interdigital area of both palm 

 and sole presents a lower intensity than its neighbors, and the 

 reduction is especially marked in brachiators. 



The intensities of interdigital areas II, III and IV indicate 

 that their sequential relations in palm and sole are serially 

 homologous in non-human primates generally, but in the human 

 foot the pattern intensities are shifted in accord with the 

 different alignment of the anatomical axis of the foot. 



